Exemple of a simple docker-compose file for Symfony project with official images

symfony_docker-compose.yml

#
# to execute a command in the container:
#     docker exec -it XXX_web_1 su www-data -c "php app/console"
#

web:
#    container_name: sf
    image: php:apache
    ports:
        - 8888:80
    links:
        - mysql:mysql
        - mailcatcher:mailcatcher
    environment:
        - DOCKER_DEV=1
        - TIMEZONE=Europe/Paris
        - PHP_EXT=pdo_mysql
    command: |
        sh -c 'sed -e "s/^DocumentRoot \/var\/www\/html/DocumentRoot \/var\/www\/html\/web/" -i /etc/apache2/apache2.conf \
            && a2enmod rewrite \
            && usermod -u `stat -c %u /var/www/html` www-data \
            && groupmod -g `stat -c %g /var/www/html` www-data \
            && chsh -s /bin/bash www-data \
            && echo "date.timezone = ${TIMEZONE}" > /usr/local/etc/php/conf.d/timezone.ini \
            && docker-php-ext-install ${PHP_EXT} \
            && apache2-foreground'
    volumes:
        - .:/var/www/html

mysql:
    image: mysql
    environment:
        - MYSQL_ROOT_PASSWORD=mysecretpw

mailcatcher:
    image: schickling/mailcatcher
    ports:
        - 10080:1080

Just for fun.
Don't use it for real ;-)